code: def boston_housing_dataset():
      (x_train, y_train), (x_test, y_test) = boston_housing.load_data()
      return x_train, y_train, x_test, y_test
  
file_path: elephas/tests/conftest.py
imports: import pytest
  from tensorflow.keras import Sequential, Input, Model
  from tensorflow.keras.datasets import mnist, boston_housing
  from tensorflow.keras.layers import Dense, Activation, Dropout
  from tensorflow.keras.utils import to_categorical
label_desc: Use image node_id 5 for calling a global function with example usage: boston_housing_dataset() and returns: x_train,  y_train,  x_test,  y_test